نتایج جستجو برای: such as hibernation
تعداد نتایج: 5962676 فیلتر نتایج به سال:
We studied the impact of hibernation and food supply on relative telomere length (RTL), an indicator for aging and somatic maintenance, in free-living edible dormice. Small hibernators such as dormice have ∼50% higher maximum longevity than non-hibernators. Increased longevity could theoretically be due to prolonged torpor directly slowing cellular damage and RTL shortening. However, although m...
The aim of our study was to investigate the changes that occur in functional responses of the golden hamster mesenteric arterial bed after: 1) 8 wk of hibernation and 2) 2 hr after arousal from hibernation. Age-matched and cold-exposed hamsters were used as controls. At 8 wk after hibernation there was an increase in sensitivity of vasoconstrictor responses to sympathetic nerve stimulation but ...
Massive actuator arrays found their applications in robotics, pharmaceutics, aerospace, etc. Compared with electrically and/or pneumatically powered actuator array, hydraulic actuator has the comprehensive advantages of higher force density (i.e. force / actuation area), better controllability, and simpler remote control accessibility. This paper presents approaches to construct and control a m...
Torpor bouts of mammalian hibernators are generally shorter at the beginning and end and are consistently longer during the main part of the hibernation season. Because it is not known why the duration of torpor bouts changes at the beginning and end of the hibernation season, we studied thisphenomenon in two sciurid rodents: Spermophilus saturatus (200-300g) and Eutamias amoenus (45-60g). We e...
Hibernation is one type of torpor, a hypometabolic state in heterothermic mammals, which can be used as an energy-conservation strategy in response to harsh environments, e.g. limited food resource. The liver, in particular, plays a crucial role in adaptive metabolic adjustment during hibernation. Studies on ground squirrels and bears reveal that many genes involved in metabolism are differenti...
The use of daily torpor and/or of multi-day torpor bouts during a hibernation season are energy-saving survival strategies that have been well-studied for many years, particularly for small mammals living in seasonally-cold environments. Both phenomena are characterized by a regulated suppression of metabolic rate, a slowing of many physiological processes (e.g., heart and breathing rates, orga...
Synopsis The conquest of land has endowed air-breathers with the capability to utilize ventilation not only to acquire oxygen but also to control blood and intracellular acid-base state. Hypercapnic acidosis (resulting from ventilatory control and/or behavioral choice), thus, has become a universal component of hypometabolic states in air-breathers, with inhibitory and/or protective roles. Here...
in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
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